Update api/ltx_server.py

api/ltx_server.py

@@ -416,7 +416,7 @@ class VideoService:
         if num_latente_por_chunk >= sum_latent:
             return [latents_brutos.clone()]
     
-        steps = (sum_latent + num_latente_por_chunk - 1) // num_latente_por_chunk  # ceil
+        steps = (sum_latent -2 ) // num_latente_por_chunk 
         print("================PODA CAUSAL=================")
         print(f"[DEBUG] TOTAL LATENTES = {sum_latent}")
         print(f"[DEBUG] Num LATENTES por chunk = {num_latente_por_chunk}")
@@ -425,10 +425,12 @@ class VideoService:
         for i in range(steps):
             start = i * num_latente_por_chunk
             end = start + num_latente_por_chunk
-            if i > 0:
-                start -= overlap  # sobreposição
-            if end > sum_latent:
+            #if i > 0:
+            #    start = overlap  # sobreposição
+            if end >= sum_latent:
                 end = sum_latent
+            else:
+                end = overlap
             chunk = latents_brutos[:, :, start:end, :, :].clone()
             chunks.append(chunk)
             print(f"[DEBUG] chunk{i+1}[:, :, {start}:{end}, :, :] = {chunk.shape[2]}")
@@ -463,7 +465,9 @@ class VideoService:
         video_fade_fim = None
         video_fade_ini = None
         nova_lista = []
-    
+
+        print("===========CONCATECAO CAUSAL=============")
+     
         print(f"[DEBUG] Iniciando pipeline com {total_partes} vídeos e {poda} frames de crossfade")
     
         for i in range(total_partes):
@@ -504,13 +508,14 @@ class VideoService:
                 
             # --- TRANSIÇÃO ---
             if video_fade_fim and video_fade_ini:
-                video_fade  = os.path.join(pasta, f"transicao_{i-1}_{i}.mp4")
+                video_fade  = os.path.join(pasta, f"transicao_{i}_{i+1}.mp4")
                 cmd_blend = (
                     f'ffmpeg -y -hide_banner -loglevel error '
                     f'-i "{video_fade_fim}" -i "{video_fade_ini}" '
                     f'-filter_complex "[0:v][1:v]blend=all_expr=\'A*(1-T/{poda})+B*(T/{poda})\',format=yuv420p" '
                     f'-frames:v {poda} "{video_fade}"'
                 )
+                print(f"[DEBUG] transicao adicionada {i}/{i+1} {self._get_total_frames(video_fade)} frames ")
                 subprocess.run(cmd_blend, shell=True, check=True)
                 nova_lista.append(video_fade)
                 
@@ -525,13 +530,12 @@ class VideoService:
                 subprocess.run(cmd_fim, shell=True, check=True)
 
             nova_lista.append(video_podado)
-            
+            print(f"[DEBUG] Video podado {i+1} adicionado {self._get_total_frames(video_podado)} frames ")
+               
 
 
-            
-        print(f"[DEBUG] Nova lista finalizada com {len(nova_lista)} partes.")
+        print("===========CONCATECAO CAUSAL=============")
         print(f"[DEBUG] {nova_lista}")
-     
         return nova_lista
     
     def _concat_mp4s_no_reencode(self, mp4_list: List[str], out_path: str):